Grinding-machine



Patented Oct. 19, 1920.

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GRINDING MACHlNE. APPLICATION FILED AUG-20. 1917. RENEWED SEPT. 9, 1920.

1,356,068. I Patented Oct. 19,1920.

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F. G. HOLLAND.

GRINDING MACHINE.

APPLICATION FILED AUG.20, 19H. RENEWED SEPT 9. 1920.

Patented Oct. 19, 1920.

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I 26" I I I 26 I t I I l I 26' 6 57 I as as J5 I 64 7 fnuenzor H aiFazz/E QZQZZazzd L f 7 i213 dliorney j F. G. HOLLAND. GRINDING MACHINE. APPLICATION FILED AUG.'20. 1911. RENEWED SEPT 9. 1920.

1,356,068., Pawnted Oct. 193920.

4 SHEETS-SHEET 4.

Ill.

' mun by I W E la: aiiornqyf i242); aZ /Mz UNITED TAT FRANK Gr. HOLLAND, OF CLEVELAND, OHIO, ASSIGNOR T0 STAMPING COMPANY, OF CLEVELAND,

ES PATENT oFFicE.-

THE GLOBE FMAGHINE & OHIO.

GRINDING-MACHINE.

Application filed August 20, 1917, Serial No. 187,303.

the invention being herein explainedand the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

This invention relates to a grinding machine and more particularly to one of the rotary surface type. The exemplifying structure disclosed by the drawings is especially adapted for grinding rings such as clutch rings or variously sized washers.

My object has been to design a structure differing in several fundamental respects whereby to achieve the following list of advantages, namely: a

1'. To strengthen and thereby insure precision during the operative engagement. This is accomplished by reversing one of the relative movements as between the work and tool, that is to say, the grinding wheel rotates in a fixed position while the work support moves. being thus enabled constantly. to, hold the tool spindle in rigid alinement by avoiding the excessive leverage which occurs when the same is moved parallel to its own axis.

2. To increase the working capacity of the machine. This is made possible owing to a duplex arrangement, either part of which'may however, desired, be" operated independently of the other. By this means the operator mayprepare for one job on the idle part and at the same time carry. on the performance of the other.

3. To automatically control both a lifting. and traverse movement of the work support relative to the position of the tool, andito provide an automatic adjustment as well,

in order uniformlyto distribute the abrad ing action.

4L. To eliminatesliding surfacesand effectively protect the .'.circular working parts against the entry of grit and dust.

. Specification of Letters Patent.

so accomplished with my machine.

range of action or throw.

The advantage consists in line IIIIII of Fig.

Patented Oct. 19, 1920. Renewed September 9, 1920. Serial No. 409,291.

F or theperformance of the class of work for. wh ch the machine embodying invention'is peculiarly useful it is either necessaryor desirable to operative movements: I

1. High speed rotation (of the'abrading provide four primary wheel or wheels.

2. Rotation of the work support. 3. Feed of the work toward the grinding wheel.

4. Travel of the work in verse to the feed.

All of these operations are,ofcourse, pref- I era blyautomatic and are ca'pable'of being Besides the foregoing, it is desirable toprovide various ad ustments whereby to control the Accordingly, I have provided means for regulating the amount of feed, means for automatically causing a cessation of the automatic feed,

means for timing the initiation of the automatic feed movement, and duplex means for varying the range of travel of the work across the grinder, such travel being in fact an oscillatory movement.

'a direction transe Besides the preceding enumeration, I have aimed 'toconstruct a machine and actually succeeded in so doing which will be neat and trim in appearance, smooth and firm in. action and reliable in operation.

VViththe foregoing andother objects in view the invention consists of thenovel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to beunderstood that changes, variations and modifications can be resorted to which come within the scope of the claims hereuntoappended.

Adverting to the drawings Figure I is an elevation of a grinding machine embodying my invention.

F g. II is a top plan View of Fig. I. Fig. III is a mainly vertical section 'on I; i Fig. IV is a horizontal section on line IV-IV of Figs. I and III.

IFig. V is a section on line V V of Fig. 1.

Fig. VI is a vertical cross section through an upright frame 2 which in turn carries at its top horizontal bearings 3 in which a spindle 4 is mounted. Secured to opposite ends of the spindle are a pan of grinding wheels 5. These are adapted to be driven a? high speed by means of a pulley 6 which is to be driven from a countershaft not shown. It should be understood that in my machine the wheels 5, except for their rotary movement, are fixed inst movement in any other direction.

Supported in suitable bearings 7 on one side of the machine, namely, the front side as viewed in Fig. I is a horizontal shaft 8 at one end of which are fast and loose pulleys 9 and 10 respectively and at the intermediary point such shaft carries a cone pulley 11. Two of the bearings 7 are located between tl epulleys while the third is mounted at the upper end of one of two duplicated frame members 12 which is in tended to support the work piece above a water guard 13. Inasmuch as the construction of each end. of the machine is identical only one end will be specifically described and in fact the opposite end which is not shown supplied with a water guard.

Rotation of chuck.

The opposite side of the machine s similarly provided with a pair of bearin s l l in which is mounted a shaft 15 cai'rvn one end fast and loose pulleys 16 and 17' and, at the intermediary point a cone pulley 18, all as shown. in Fig. II. The opposite end of the shaft 15 extends through a hollow member 19 in alinement with the bearings 14 and forming an upper part of a framestructure corresponding to the structure 12 at the opposite end. irecting attention to Fig. III'it will be seen that interiorly of the structure 19 the shaft 15 carries bevel gear 20 which meshes with a bevel 21 at the upper end of a vertical shaft 22 which extends through the enter of oscillation of a swinging work support 23. Such support is shown in Fig. III to be mounted upon a ball bearing 24. The lower end of the shaft 22 is a cone pulley 25 operatively connected by means of a belt 26 with another cone pulley 2? at the lower end of a short shaft 28-. Keyed to the latter is a pinion 29 which drives a gear 30 having'a long sleeve 31m pulley ll is l ned 42 seen in Fl 's. I and VI. which shaft transtating in a bushing 32. The gear 80 is splined to a chuck spindle 33 on the upper end of which a magnetic chuck 3a ismounted for rotary movement on the ball bearings 35. The lower side of the chuck 3a is provided with the usual contact rings 36 and 37 which are in turn connected with an elec trical terminal 38. The chuck carries a downwardly extending flange 39 in telescopic relation with the proximate upper end of the swinging frame 23 in order to preclude the entrance of grit or dirt. A work piece W which may be considered to be a clutch ring is shown supported upon the upper surface of the chuck in a position to be operated upon by the grinding wheel 5 after adjustment in the manner to be hereinafter described. As should now be readily understood the rotation of the chuck 3a may be continuously effected when the fast pulley 16 is caused to rotate owing to the .'act that the vertical shaft 22 is in line with the center of intended oscillation of the 7 Gross tram/cl of chuck.

In order to accomplish the desired movement of the chuck relative to the plane of the wheel 5 power is taken from the cone pulley 11 by means of a belt .40 to a lower cone pulley ll as appears in Fig. I. The to one end of a worm shaft mits its rotation to a worm wheel mounted on one end of. a shaft 44. The other end ofsuch shaft carries a heart-shaped grooved cam 45 as shown in Figs. V I and VII. This cam in its rota'ions causes a roller 46 to run around in its groove. The roller 46 is mounted formovement on a short shaft 47 shown in Fig. IX which is carried by a hollowed lever structure as in which latter a plunoer ll) is mounted for adjustment as will be hereinafterdescribed. The structure 4-8 and therefore the plunger 49 are pivotally mounted upon a shaft 50 shown in Figs. VII, VIII and X so that the lower end the structure d8 moves in and out by reas-ion of the roller following each contour of-the cam. The upper end of the plunger 4e will be likewise oscillated back and forth. A link 51 has a universal joint with the pper end of the plunger e9 by means of a clevis 52 which is pivoted in transverse directions of both plunger and 'link. The other end of the link 51 has a ball and socket joint'connection at 58 withaportion 54: of the frame that carries the chuck spindle; This connection is most clearly seen in Fig. VII though the link'itself may also'be seen in Fi I. As should now be the shaft li causes an actuation of the hang of the oscillatory chuck supporting link 51 back and forth and consequently an oscillation of tie rame 5% about the axis of the vertical shaft-22 and upon the roller bearings 24%. Directing attention to Figs. VIII and IX it will be noticed that one end of the shaft carries a worm gear which may be actuated by a worm 56 on a short shaft 57 extending through a suitable bearing 58. The other end of the shaft 57 carries aknob 59 by means of which its movement may be effected for the purpose to be now described. Theopposite end of the pivot shaft 50 has secured to it a spur pinion 60 adapted to mesh with rack teeth 61 cut out of one side of the plunger 49 as may be seen in Fig. VII. ny this means an adjustment of the knob 59 causes a movement of the lunger 4L9 and in consequence a greater or less distance between the pivot iart 50 and the clevis 52, whereby the ,cillatory travel of the link is either inc-eased or decreased and the movement of he chuck across the grinding wheel simiarly increased or decreased to suit the vari: ous widths'of rings which it is proposed to grind. As a further means of adjustment, according to thediameter of the rings which are to beground, I have arranged an ad.- justment of the ball and socket connection along the link 51 by means of any ap proved type of clamp 62. Inthis manner the throw of the work may be located at the proper position preparatory to making the more delicate adjustment by means of the knob 59. r r

Owing to the latter, considerable overframe, I have thought it advisable to pro vide auxiliary supporting means in the form of an arcuate track 63 in order to relieve The the bearings 2st of some of the strain.

track 63 is clearly shown in F III and IV and is adapted to be traversed by a roller 64 secured at the bottom of a pin 65 which is yieldingly mounted for vertical move-- ment by means of a spring 66 located in adepending portion 67 of the frame;

Upward feed of chuck. I I In following the description ofithe mecha nism for accomplishing'the automatic feed of the chuck toward the wheel 5 consideration of Figs. I, III and V is suggested.

The chuck supporting bearings 35 are in:

, turn supported on'a flanged sleeve 68 which 'ated. The nut 70 held against actual surrounds but is spaced from the spindle33. 'Only the lower end ofthe sleeve 68 is fashioned with exterior thread 69 with which a nut 70, having only its upper end interiorly threaded at 71, is operatively associmovement in the casting, whereas the sleeve 68 is free to move up and down. A gear 72 is firmly secured to a lower tapered portion of the nut 70 and held in place thereon by means of a lock nut 73. This gear is adapted to be rotated by a pinion 74 carried upon a short vertical shaft 7 5 at the upper end of which is a bevel gear 7 6 in mesh with another bevel gear 77 on the inner end of a shaft 78. Both the shaft and the shaft '78 are mountec in suitable bearings formed in a supportingbracket 79. Near the opposite end of a horizontal shaft 78 is a hubbed ratchet 80 around the hub of which an actuating arm 81 is loosely mounted. Pivoted to the upper end of the actuating arm is an actuating pawl 82 adapted to advance the ratchet a given number of notches, whenever the lower end 83 of the arm is moved to the left as viewed in Fig; I. VThe end 83 is so moved during the oscillation of the along a bed flange 85 as will be clearly perceived by inspection of Figs. I and III. As the shaft 78 is thus intermittently given partial rotation a finger 86 fixed outwardly beyond the ratchet is caused to move around therewith until it presently lifts the pawl SQandthereby precludes the further functioning thereof. The initial radial position of the finger 86 maybe adjusted by means of'a suitable set screw 87. Inthis manner a cessation of the automatic upward feed of the chuck is automatically accomplished after whicl'iiinal calibration must be .c res sorted to. The pawl is provided with an outwardly projectin pin 88. by means of which it'may be manually lifted whenever it isdesired to manipulate the feed ofthe chuck through the agency ofua suitable handle 89 on the outer end of the shaft 78.

It is evident that my machine, besides effecting the rotation of both the tool-and work, enables both. cross-travel and'an upward feed of the latter to be automatically accomplished. More than that, various ad- *justments are provided for prescribing the i range of certain actions and besides an automaticth'row-ofl' attachment for limiting the effective"operation of the automatic feed movement.

1. A'g-rinding mounted to rotate tary work chuck mounted for oscillatory machine comprising .a wheel movement relative to said wheel in a substantially horizontal plane therebelow and automatically operated means for imparting I step by step feed movement to saidchuck.

2. A grinding machine comprising. a tool, means for operating 1 the same, a worksup port, means for moving said support relain a fixed position, a ro'-- tive to the tool in one direction and means for moving said support in another direction relative to said tool, one of said distinct support movements being adapted automatically to initiate the movement of the other.

3. A. grinding machine comprising a tool, means for operating the same, a work support, means for effecting a second relative movement between said support and tool, and means for eilecting a third relative movement between said support and tool, one or said distinct support movementsbeing adapted automatically to initiate the movement of the other intermittently at predetermined intervals.

4:. A grinding machine comprising; a rotary tool. a work chuck, means for feeding said chuck toward said tool, and means for oscillating said chuck across the rotary path of said tool, said oscillating movementbeing adapted intermittently to initiate the feeding movement.

A grinding machine comprising a rotary abrading tool, rotary -work support, mechanism for swinging said support bodily about an axis, means adapted to swing with said support for raising or lowering said support toward or away from said tool respectively, and a stop, said means including a pr jecting part adapted during its swinging movement to engage said stop whereby automatically to actuate said means- 6. A grinding machine comprising a rotary abrading tool, a rotary work support, n cehanism for swinging said support bodily about an axis, means adapted to swing with said support for feeding said support substantially parallel. with said axis, and an adjustable stop, said means including a proecting part adapted during its swinging movement to engage said stop whereby said means is intermittently actuated.

7. A grinding machine comprising a rotary tool, a work chuck movable in operative proximity thereto, means "for eifecting the compound movement of said chuck, and adjustable means for determining the duration of one component of movement.

8. A grinding machine comprising a rotary tool, a work support movable relative to the said tool, means "for eil'ecting such movement, a chuck independently feedable upon said support, and an automatically ,op-

erated device for eiiecting the throw-off of said chuck feeding means.

9. ii grinding machine comprising a ro tary tool, an oscillatory work chuck, means for effecting such movement, said chuck being additionally movable toward and away from said tool, and automatically operatiii means for feeding said chuck towafd said tool and automatically operating.

means for limiting such feeding movement said chuck.

10. A grinding machine comprising a 1'0- tary toolspindle, a pair of abrading tools thereon, a pair or" rotary work supports, mechanism for simultaneously swinging said supports bodily across said tools respectively, duplex means adapted to swing with said supports for moving said supports toward or away -from said tools respectively, stops, said feeding means including projecting parts adapted during their swinging movement to engage said stops respectively whereby said feeding means is intermittently actuated. and an automatically operated throwpit device associated with said feeding means and ada ited to cause a cessation of its intermittent action at a predetermined point of its advance.

11. A. grinding machine comprising a rotary tool, a rotary work chuck, means for effecting the rotations of said tool and chuck, and automatically operating mechanism for alter ately e'liecting the compound bodily movement of one of said rotating parts first iii arcuate and strai ht-line components of movement and then in only one of said paths.

12. A grinding machine comprising a rotool, a rotary work chuck, means for effecting the rotations of said tool and chuck, and means for effecting the reciprocal bodily movement of said chuck along one path and simultaneously in a diiierent direction.

13. A grinding machine comprising a substantial v horizontal spindle, a pair of grinding wheels thereon, a pair of vertically movable work supports mounted so as to be oscillatory in horizontal planes b ow said wheels respectively and means simultaneously moving said supports past the wheels respectively and vertically to said planes.

' 1%. A grinding machine comprising a substantially horizontal spindle, a pair of grinding wheels thereon, a pair of oscilla' tory work supports, means for simultaneously swinging said supports bodily past said-wheels respectively, chucks movably carried upon said supports, and means r'or simultaneously feeding said chucks relative to said wheels.

15. grinding machine comprising abed, an abrading tool mounted for movement thereon, work chuck mounted for movement upon said bed, means-for operating said tool and chuck, and means for automatically eriecting the compound movement of one of said operative parts toward the other and for causing a cessation of one bed, means for rotating said tool and chuck,

autoimrtically operating means for feeding said chuck toward the tool and automatically operating means for terminating said feeding; movement.

17. A grinding machine comprising; a bed, an abrading tool mounted for movement thereon, a work chuck mounted for movement upon said bed, means for operating said tool and chuck and means for effecting an additional compound movement of said chuck comprising component move ments along an arc and along a straight line respectively. 7 7

18. A grinding machine comprising a bed, an abrading tool mounted for movement thereon, a work chuck mounted for movement upon said bed, means for operating said tool and chuck, and means for effecting an additional compound bodily movement of said chuck comprising a component oscil latory movement and a component automatic feed movement toward said tool.

19. A grinding machine comprising a. bed, a spindle, an abradiug tool mounted there on, means for rotating said spindle, a drivingshaft, a pivotal shaft connected with said driving shaft, a work support oscillatorily mounted upon said bed about pivotal shaft as an axis, means for oscillating said support, a chuck spindle rotatably mounted in said support so as to do scribe an arc of movement about the axis of the latter, a work chuck carried by said chuck spindle, mechanism operatively connecting said pivotal and drawing shafts and adapted to rotate said chuck spindle, said chuck spindle being additionally mounted in said support so as to be capable of axial feed movement, feed mechanism operatively connected with said chuck spindle and adapted to effect its axial movement and means for actuating said feed mechanism.

20. A grinding; machine comprising a bed, a horizontal spindle, an abrading tool mounted thereon, means for rotating said spindle, a driving shaft, a vertical pivotal shaft connected with said. driving shaft, a work support oscillatorily mounted upon said bed about said pivotal shaft as an axis, means for oscillating said support, a track upon which the free end of said support may travel, a vertical chuck spindle rotatably mounted in said support so as to describe an arc of movement about the axis ofthe latter, a work chuck carried by said chuck spindle, mechanism operatively connecting said driving and pivotal shafts and adapted to rotate said chuck spindle, said chuck spindle being additionally mounted in said support so as to be capable of axial feed movement, feed mechanism operatively connected with said chuck spindle and adapted to effect its axial movements and means for actuating said feed mechanism intermit -tently, including a stop on sand bed and a member operatively connected with said feed mechanism and adapted to engage such stop.

21. A grinding machine comprising a bed, a spindle, an abrading tool mounted thereon, means for rotating said spindle, a driving shaft, a pivotal shaft connected with said driving shaft, a work support oscillatorily mounted upon said bed about said pivotal shaft as an axis, means for oscillating said support, a chuck spindle rotatably mounted in said support so as to describe an arc of movement about the axis of the latter, a work chuck carried by said chuck spindle, mechanismoperatively connecting said pivotal and driving shafts and adapted to rotate said chuck spindle, said chuck spindle being additionally mounted in said st ipport so as to be capable of axial feed movement, feed mechanism operatively connected it 'th said chuck spindle and adapted to effect it axial movement anc means for actuating said feed mechanism intermittently include ing a stop adjustably secured to said bed, a member operativcly connected with said feed mechanism and adapted to engage such stop, a ratchet, and a pawl carried upon said member in engagement with said ratchet.

22. A grinding machine comprising a bed, a spindle, an abrading tool mounted thereon means for rotating said spindle, a driving; shaft, a pivotal shaft connected with said driving shaft, a work support oscillatorily mounted upon said bed aboutsaid pivotal shaft an axis, means including a shaft connected with said driving;- shaft and an oscil;

latinp; device upon said bed for oscillating said support, a chuck spindle rotatably mounted in said support so as to describe an arc of movement about the axis of the latter, a work chuck carried by said chuck spindle, mechanism operatively connecting said pivotal shaft and adapted to rotate said chuck spindle, said chuck spindle being additionally mounted in said support so as to' be capable of axial feed movement, feed mechanism operatively connected with said chuck spindle and adapted to effect its axial chuck spindle rotatably mounted thereon, 1

intermittently operating mechanism for progressively feeding said chuck spindle axially and means for swinging said support about an axis.

25. A grinding machine comprising a bed, a rotary tool spindle, a work support oscillatorily mounted on said bed, a chuck spindle me: ianism, said means including an automatically operating throw-0E device whereby to determine the cessation of saidfeed actuation.

27. A grinding machine comprising a bed provided with a track, a rotary tool spindle, and a work support pivoted upon said bed and adapted to oscillate upon said track.

28. A grinding machine comprising a bed provided with a track, a rotary tool spindle, a work support pivoted upon said bed and having a lateral extension, a chuck upon said extension and adapted to describe an arc, and a projecting member carried by said extension and adapted to ride upon said track whereby to relieve the strain at said pivot.

29. A grinding machine, comprising a bed provided with a track, a rotary tool spindle, a work support pivoted upon said bed and adapted to oscillate upon said track having a lateral extension, means for, actuating said support, a chuck upon said extension and adapted to describe an arc, a roller yieldingly carried by said extension and adapted to ride upon said track whereby to relieve the strain at said pivot, said support actuating means including an adjustable device whereby to vary the length of the are described.

30. A grinding machine comprising a bed, a rotary tool spindle, a work support pivoted upon said bed and adapted to oscillate upon said track having a lateral extension, means for actuating said support, a rotary chuck spindle in said extension, a chuck' upon said spindle and adapted to describe an are along with said extension, said. support actuating means including a heart shaped cam and an adjustable rocking device for regulating its throw, and mechanism includ ing a shaft positioned at said support pivot for rotating said chuck spindle.

31. A grinding machine comprising a bed, an abrading tool operatively mounted thereon, a work support pivotally mounted upon said bed and fashioned with a lateral to ride around said cam so as to rock said member, and an adjustable connection between said member and support extension.

32. A grmding machine comprising a bed, an abrading tool operatively mounted thereon, a work support pivotally mounted upon said bed and fashioned with a lateral extension, and mechanism for swinging the latter about its pivot and including a shaft, a cam thereon, a structure pivotally nounted upon said bed and carrying a part adapted. to ride around said cam so as to rock said structure, a member adjustably connectedv with said structure, means for eifecting such adjustment, and a link articulating with said member and with said work support ext-ension.

33. A grinding machine comprising bed, an abrading tool operatively mounted thereon, a work support pivotally mounted upon said bed and fashioned with a lateral extension, and mechanism for swinging the latter about its pivot and including a shaft, a heart-shaped grooved cam thereon, a hollow structure pivotally mounted upon said bed and carrying a roller adapted to run in the groove of said cam so as to rock said structure, a toothed member adjustably mounted in said structure, means including a gear for eii'ecting such adjustment, a link articulating with said member and with said work support extension and means for 'aryin g the point of articulation of said link with said extension whereby to locate the throw of the latter at the proper position.

34. A grinding machine comprising a bed, an abrading tool movably mounted thereon, a work support movably mounted upon said bed, a chuck movably mounted pen said support, means for actuating said tool, said support and said chuck, said chuck moving means being autometically operated by the movement of said support, and distinct adjustable means for limiting the movements of said support and for determining the duration of said automatic chuck movement.

35. A grinding machine comprising a bed, a rotatable abrading tool movably mounted thereon, a rotatably mounted chuck adapted for compound movement relative to said bed, means for rotating said tool and said chuck, and mechanism for simultaneously actuating said chuck in two distinct directions and in one of such directions automatically.

Signed by me this 16th day of August,

FRANK G. HOLLAND. 

